﻿using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Text.RegularExpressions;

namespace LevSTProgramTransform
{
    /// <summary>
    /// To gather all Mass Utility functions
    /// </summary>
    class MassUtilityClass
    {
        /// <summary>
        /// ModBus Crc16 Table.
        /// </summary>
        /// <seealso cref="ushort[]"/>
        /// <remarks>
        /// Using CRC-16-IBM coding
        /// CRC table for the CRC-16. The poly is 0x8005 (x^16 + x^15 + x^2 + 1).</remarks>
        private static ushort[] CrcTable = {
            0X0000, 0XC0C1, 0XC181, 0X0140, 0XC301, 0X03C0, 0X0280, 0XC241,
            0XC601, 0X06C0, 0X0780, 0XC741, 0X0500, 0XC5C1, 0XC481, 0X0440,
            0XCC01, 0X0CC0, 0X0D80, 0XCD41, 0X0F00, 0XCFC1, 0XCE81, 0X0E40,
            0X0A00, 0XCAC1, 0XCB81, 0X0B40, 0XC901, 0X09C0, 0X0880, 0XC841,
            0XD801, 0X18C0, 0X1980, 0XD941, 0X1B00, 0XDBC1, 0XDA81, 0X1A40,
            0X1E00, 0XDEC1, 0XDF81, 0X1F40, 0XDD01, 0X1DC0, 0X1C80, 0XDC41,
            0X1400, 0XD4C1, 0XD581, 0X1540, 0XD701, 0X17C0, 0X1680, 0XD641,
            0XD201, 0X12C0, 0X1380, 0XD341, 0X1100, 0XD1C1, 0XD081, 0X1040,
            0XF001, 0X30C0, 0X3180, 0XF141, 0X3300, 0XF3C1, 0XF281, 0X3240,
            0X3600, 0XF6C1, 0XF781, 0X3740, 0XF501, 0X35C0, 0X3480, 0XF441,
            0X3C00, 0XFCC1, 0XFD81, 0X3D40, 0XFF01, 0X3FC0, 0X3E80, 0XFE41,
            0XFA01, 0X3AC0, 0X3B80, 0XFB41, 0X3900, 0XF9C1, 0XF881, 0X3840,
            0X2800, 0XE8C1, 0XE981, 0X2940, 0XEB01, 0X2BC0, 0X2A80, 0XEA41,
            0XEE01, 0X2EC0, 0X2F80, 0XEF41, 0X2D00, 0XEDC1, 0XEC81, 0X2C40,
            0XE401, 0X24C0, 0X2580, 0XE541, 0X2700, 0XE7C1, 0XE681, 0X2640,
            0X2200, 0XE2C1, 0XE381, 0X2340, 0XE101, 0X21C0, 0X2080, 0XE041,
            0XA001, 0X60C0, 0X6180, 0XA141, 0X6300, 0XA3C1, 0XA281, 0X6240,
            0X6600, 0XA6C1, 0XA781, 0X6740, 0XA501, 0X65C0, 0X6480, 0XA441,
            0X6C00, 0XACC1, 0XAD81, 0X6D40, 0XAF01, 0X6FC0, 0X6E80, 0XAE41,
            0XAA01, 0X6AC0, 0X6B80, 0XAB41, 0X6900, 0XA9C1, 0XA881, 0X6840,
            0X7800, 0XB8C1, 0XB981, 0X7940, 0XBB01, 0X7BC0, 0X7A80, 0XBA41,
            0XBE01, 0X7EC0, 0X7F80, 0XBF41, 0X7D00, 0XBDC1, 0XBC81, 0X7C40,
            0XB401, 0X74C0, 0X7580, 0XB541, 0X7700, 0XB7C1, 0XB681, 0X7640,
            0X7200, 0XB2C1, 0XB381, 0X7340, 0XB101, 0X71C0, 0X7080, 0XB041,
            0X5000, 0X90C1, 0X9181, 0X5140, 0X9301, 0X53C0, 0X5280, 0X9241,
            0X9601, 0X56C0, 0X5780, 0X9741, 0X5500, 0X95C1, 0X9481, 0X5440,
            0X9C01, 0X5CC0, 0X5D80, 0X9D41, 0X5F00, 0X9FC1, 0X9E81, 0X5E40,
            0X5A00, 0X9AC1, 0X9B81, 0X5B40, 0X9901, 0X59C0, 0X5880, 0X9841,
            0X8801, 0X48C0, 0X4980, 0X8941, 0X4B00, 0X8BC1, 0X8A81, 0X4A40,
            0X4E00, 0X8EC1, 0X8F81, 0X4F40, 0X8D01, 0X4DC0, 0X4C80, 0X8C41,
            0X4400, 0X84C1, 0X8581, 0X4540, 0X8701, 0X47C0, 0X4680, 0X8641,
            0X8201, 0X42C0, 0X4380, 0X8341, 0X4100, 0X81C1, 0X8081, 0X4040 };

        /// <summary>
        /// Compute CRC 16 by Using ModBus Crc16 Table
        /// </summary>
        /// <param name="data">serial byte data array</param>
        /// <seealso cref="byte[]"/>
        /// <returns>CRC16</returns>
        /// <seealso cref="UInt16"/>
        public static UInt16 ComputeModBusCrc16(byte[] data)
        {
            ushort crc = 0xFFFF;

            foreach (byte datum in data)
            {
                crc = (ushort)((crc >> 8) ^ CrcTable[(crc ^ datum) & 0xFF]);
            }

            return crc;
        }

        /// <summary>
        /// Compute CheckSum 16
        /// </summary>
        /// <param name="data">serial byte data array</param>
        /// <seealso cref="byte[]"/>
        /// <returns>CheckSum16</returns>
        /// <seealso cref="UInt16"/>
        public static UInt16 ComputeCheckSum16(byte[] data)
        {
            ushort crc = 0;

            foreach (byte datum in data)
            {
                crc += datum;
            }

            return crc;
        }
        public static byte CalculateChecksum8(byte[] data)
        {
            //byte[] byteToCalculate = Encoding.ASCII.GetBytes(dataToCalculate);
            int checksum = 0;
            foreach (byte chData in data)
            {
                checksum += chData;
            }
            checksum &= 0xff;
            byte[] add = BitConverter.GetBytes(checksum);
            return add[0];
        }
        public static byte CalculateHexChecksum8(byte[] data)
        {
            //byte[] byteToCalculate = Encoding.ASCII.GetBytes(dataToCalculate);
            int checksum = 0;
            foreach (byte chData in data)
            {
                checksum += chData;
            }
            checksum &= 0xff;
            byte[] add = BitConverter.GetBytes((~checksum) + 1);
            return add[0];
        }
        /// <summary>
        /// Combine Multi-white Spaces to One Space and Trim the string.
        /// Multi-white Space include Tab and Enter.
        /// </summary>
        /// <param name="str">Original String to be process</param>
        /// <returns>Return new string that already replacing and combining Multi-white Space</returns>
        /// <example>
        /// input: " this is      an    example .  "
        /// after process: "this is an example ."
        /// </example>
        public static string StringTrim_Replace_EnterAndTab_CombineMultiSpaceToOne(string str)
        {
            str = str.Trim();
            if (str.Equals(String.Empty))
            {
                return "";
            }
            str = str.Replace('\t', ' ');   //取代 tab
            str = str.Replace('\r', ' ');   //取代 回車
            str = Regex.Replace(str, @"\s+", " ");  //多個空格合倂成一個空格, 並以" "取代空格
            return str;
        }

        /// <summary> Converts an array of bytes into a formatted string of hex digits (ex: E4 CA B2)</summary>
        /// <param name="data"> The array of bytes to be translated into a string of hex digits. </param>
        /// <returns> Returns a well formatted string of hex digits with spacing. </returns>
        public static string ByteArrayToHexString(byte[] data, bool withSpace)
        {
            StringBuilder sb = new StringBuilder(data.Length * 3);
            if (withSpace)
            {
                foreach (byte b in data)
                    sb.Append(Convert.ToString(b, 16).PadLeft(2, '0').PadRight(3, ' '));
                return sb.ToString().ToUpper();
            }
            else
            {
                foreach (byte b in data)
                    sb.Append(Convert.ToString(b, 16).PadLeft(2, '0'));
                return sb.ToString().ToUpper();
            }
        }
        /// <summary> Converts an array of bytes into a formatted string of hex digits (ex: E4 CA B2)</summary>
        /// <param name="data"> The array of bytes to be translated into a string of hex digits. </param>
        /// <returns> Returns a well formatted string of hex digits with spacing. </returns>
        public static string ByteToHexString(byte data)
        {
            StringBuilder sb = new StringBuilder(5);
            sb.Append(Convert.ToString(data, 16).PadLeft(2, '0').PadRight(3, ' '));
            return sb.ToString().ToUpper();
        }
        /// <summary> Convert a string of hex digits (ex: E4 CA B2) to a byte array. </summary>
        /// <param name="s"> The string containing the hex digits (with or without spaces). </param>
        /// <returns> Returns an array of bytes. </returns>
        public static byte[] HexStringToByteArray(string s)
        {
            s = s.Replace(" ", "");
            if ((s.Length % 2) > 0)
            {
                return new byte[1];
            }
            byte[] buffer = new byte[(s.Length / 2)];
            for (int i = 0; i < s.Length; i += 2)
                buffer[i / 2] = (byte)Convert.ToByte(s.Substring(i, 2), 16);
            return buffer;
        }

        public static string ByteArrayToString(byte[] values)
        {
            string str = "";
            foreach (byte letter in values)
            {
                int value = Convert.ToInt32(letter);
                str += (char)letter;
            }
            return str;
        }
        public static DateTime PauseForMilliSeconds(int MilliSecondsToPauseFor)
        {
            System.DateTime ThisMoment = System.DateTime.Now;
            System.TimeSpan duration = new System.TimeSpan(0, 0, 0, 0, MilliSecondsToPauseFor);
            System.DateTime AfterWards = ThisMoment.Add(duration);
            while (AfterWards >= ThisMoment)
            {
                System.Windows.Forms.Application.DoEvents();
                ThisMoment = System.DateTime.Now;
            }
            return System.DateTime.Now;
        }  
    }
}
